Year	Number of
1990	7619.1
1991	8105.64
1992	8512.29
1993	9005.63
1994	9367.17
1995	9885.48
1996	9660.2
1997	9263.47
1998	8753.29
1999	9034.7
2000	9134.35
2001	8932.87
2002	8917.43
2003	8885.78
2004	8875.91
2005	8906.81
2006	8450.46
2007	8633.36
2008	8650.1
2009	7970.56
2010	7625.81
2011	7313.39
2012	7477.16
2013	7469.72
2014	7061.08
2015	7132.43
2016	7282.65